DE3138645A1 - "ELECTRONIC OVERCURRENT PROTECTION DEVICE" - Google Patents

"ELECTRONIC OVERCURRENT PROTECTION DEVICE"

Info

Publication number
DE3138645A1
DE3138645A1 DE19813138645 DE3138645A DE3138645A1 DE 3138645 A1 DE3138645 A1 DE 3138645A1 DE 19813138645 DE19813138645 DE 19813138645 DE 3138645 A DE3138645 A DE 3138645A DE 3138645 A1 DE3138645 A1 DE 3138645A1
Authority
DE
Germany
Prior art keywords
transistor
mos transistor
threshold switch
consumer
protection device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19813138645
Other languages
German (de)
Other versions
DE3138645C2 (en
Inventor
Rudolf 7016 Gerlingen Gabriel
Ulrich 7251 Weissach Lehmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6142878&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3138645(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Priority to DE19813138645 priority Critical patent/DE3138645A1/en
Priority to EP82105798A priority patent/EP0075656B2/en
Priority to DE8282105798T priority patent/DE3270085D1/en
Priority to JP57167724A priority patent/JPS5869422A/en
Priority to US06/426,922 priority patent/US4491892A/en
Publication of DE3138645A1 publication Critical patent/DE3138645A1/en
Application granted granted Critical
Publication of DE3138645C2 publication Critical patent/DE3138645C2/de
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
    • H03K17/0822—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in field-effect transistor switches
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
    • H02H1/043—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks to inrush currents
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Description

In DE-OS 27 07 455 ist ein elektronischer überstromauslöser mit einem in den Verbraucherkreis zwischen Stromquelle und Verbraucher geschalteten Schalter verbunden. Ein den Strom l·-';·*/ im Verbraucher Stromkreis ermittelnder Meßschalter steuert ;;^r den als Transistor ausgebildeten Schalter im Verbraucherstromkreis V.'l^..: an, sobald über last ströme auftreten. Diese Schaltung ist recht /!; aufwendig und bietet, da sie als integrierte Schaltung aufgebaut ***~ ist, nicht die Möglichkeit, weitere Meß- und Uberwachungs-ε; ί; funktionen zu verwirklichen.In DE-OS 27 07 455 an electronic overcurrent release is connected to a switch connected in the consumer circuit between the power source and the consumer. A measuring switch which determines the current l · - '; · * / in the consumer circuit controls ;; ^ r the transistor-designed switch in the consumer circuit V.'l ^ ..: on as soon as over load currents occur. This circuit is right / !; expensive and, since it is constructed as an integrated circuit, does not offer the possibility of further measuring and monitoring ε ; ί; to realize functions.

■#■■-., ■ * ■ # ■■ -., ■ *

Z't'. Demgegenüber besteht die Aufgabe der Erfindung darin, als Z't '. In contrast, the object of the invention is as

PH*PH *

,'_'. Überstromschutzvorrichtung eine im Aufbau einfache und kosten- ':''-' - günstige Schaltung zu schaffen. , '_'. Overcurrent protection device simple in construction and cost ':''- to create favorable circuit -'.

s,X Zur Lösung dieser Aufgabe sind erfindungsgemäß die im V Kennzeichen des Anspruches 1 angegebenen Merkmale vorgesehen. s , X To achieve this object, the features specified in the characterizing part of claim 1 are provided according to the invention.

V.y In dem aus dem Verbraucher und dem MOS-Transistor mit exakt Vy In the one from the consumer and the MOS transistor with exactly

W -■ W - ■

ξ j,J: linearer Kennlinie gebildeten Stromkreis teilt sich eineξ j, J: a circuit formed by a linear characteristic divides one

f:;~:r[' angelegte Spannung in die Spannung über dem Verbraucher und f:; ~: r [ 'applied voltage in the voltage across the load and

äV. den Spannungsabfall am Transistor auf, der als Meßgröße zur ä V. the voltage drop across the transistor, which is used as a measured variable for

^£_ Ansteuerung eines Schwallwertschalters dient, der seinerseits über^ £ _ Control of a surge switch, which in turn is via

ij;.. eine Treiber stufe den Gate-Eingang des MOS-Transistors steuert.ij; .. a driver stage controls the gate input of the MOS transistor.

Ii'Ii '

|.|_ In Ruhelage der Schaltung liegt die Betriebsspannung der il| Stromversorgung von z.B. 12 V direkt an dem MOS-Transistor.|. | _ The operating voltage of the il | Power supply of e.g. 12 V directly to the MOS transistor.

«ε- Da die Auslösespannung bei ca. 1 V liegt, würde ohne zusätzliche Maßnahmen die Betriebsspannung ein Inbetriebnehmen verhindern.«Ε- Since the release voltage is approx. 1 V, without additional Measures to prevent the operating voltage from being commissioned.

Aus diesem Grunde und wegen der hohen Einschaltströme verschiedener Verbraucher ist dem Schwellwertschalter eine Verzögerungsschaltung vorgeschaltet, die eine einstellbare Ansprechzeit für die Auslösung des Schwellwertschalters gewährleistet. Die Schaltung der erfindungsgemäßen elektronischen Uberstromschutzvorrichtung ist in der Zeichnung dargestellt und wird nun näher erläutert.For this reason and because of the high inrush currents, different A delay circuit, which is an adjustable one, is connected upstream of the threshold value switch Response time for triggering the threshold switch guaranteed. The circuit of the electronic according to the invention The overcurrent protection device is shown in the drawing and will now be explained in more detail.

An eine Leitung von einem Verbraucher RL/ der an der Betriebsspannung 12 V liegt, zum Drain-Anschluß eines MOS-Transistors T1 ist ein Schwellwertschalter 1 über eine Verzögerungsschaltung 2 angeschlossen. Als Schwellwertschalter dient eine Schmitt-Trigger-Kippstufe mit den Transistoren T5 und T6, den Widerständen R6, R7, R8, R9, R10 sowie einem Druckschalter Eine der Kippstufe über einen Widerstand R11 nachgeschaltete Treiberstufe 3 besteht aus dem Transistor T7 und den Widerständen R12, R13, R14. Sie dient der Signalumkehr und der Ansteuerung des MOS-Transistors T1.To a line from a consumer RL / the operating voltage 12 V is present, a threshold switch 1 is connected via a delay circuit 2 to the drain connection of a MOS transistor T1. A threshold switch is used Schmitt trigger multivibrator with transistors T5 and T6, resistors R6, R7, R8, R9, R10 and a pressure switch One connected downstream of the flip-flop via a resistor R11 Driver stage 3 consists of the transistor T7 and the resistors R12, R13, R14. It is used for signal reversal and Control of the MOS transistor T1.

Die Höhe des Schwellwertes ist an einem Widerstand R2 einstellbar, der zwischen der Basis des Transistors T5 und dem Verbindungspunkt zur Leitung vom Verbraucher RL zum MOS-Transistor T1 liegt. Die Anschlüsse der Verzögerungsschaltung am Schwellwertschalter liegen zwischen dem Widerstand R2 und der Basis von T5 sowie zwischen dem Widerstand R7 und dem Druckschalter 4. Die Verzögerungsschaltung besteht aus den Transistoren T3 und T4, einem zwischen ihnen eingesetzten Widerstand R5 sowie aus einem emitterseitig an T3 angeschlossenen Kondensator C1 und den Widerständen R3 und R4, von denen der eine dem Kollektor, der andere der Basis des Transistors T3 zugeordnet ist.The level of the threshold value can be set at a resistor R2, that between the base of the transistor T5 and the connection point for the line from the consumer RL to the MOS transistor T1 is located. The connections of the delay circuit on the threshold switch are between the resistor R2 and the base of T5 as well as between the resistor R7 and the pressure switch 4. The delay circuit consists of the Transistors T3 and T4, a resistor R5 inserted between them and a resistor connected to T3 on the emitter side Capacitor C1 and resistors R3 and R4, one of which is the collector, the other of which is the base of transistor T3 assigned.

Beim Einschalten der Schaltung mit dem Druckschalter 4 wird der Transistor T5 mit Hilfe von T4 und T3 solange gesperrt, bis die Einschaltstromspitzen des Verbrauchers RL abgeklungen sind. Die Ansprechzeitdauer bestimmt die Entladung des Kondensators C1, der über T3 an der Betriebsspannung liegt und ständig aufgeladen ist. Bei Betätigung des Druckschalters 4 wird derWhen switching on the circuit with the pressure switch 4, the transistor T5 is blocked with the help of T4 and T3 until the Inrush current peaks of the consumer RL have subsided. The response time determines the discharge of the capacitor C1, which is connected to the operating voltage via T3 and is constantly charged. When the pressure switch 4 is operated, the

¥*"■:'¥ * "■: ' 4 W 814 W 81

0ΐ- ' ■ ■ 0ΐ- ' ■ ■

Transistor Τ3 gesperrt und somit entlädt sich T1 über R5 undTransistor Τ3 blocked and thus T1 discharges through R5 and

hält T4 so lange leitend, bis seine Schwellspannung unter- ;;.;'■■.'■ schritten wird. Dann erst kann der Schwellwertschalterkeeps T4 conductive until its threshold voltage ;;.; '■■.' ■ is exceeded. Only then can the threshold switch

"'"?■ gegebenenfalls durch überströme ausgelöst werden. "'"? ■ may be triggered by overcurrents.

:'■■;-' Als Überwachung und Anzeige des Betriebsstromes dient ein aus ?: ^ einem Transistor T2, einer Leuchtdiode D1 und einem Widerstand :' ' R1 gebildeter Stromkreis. Mit dem Transistor T2, dessen Basis *'/ über den Widerstand R1 mit dem Drain-Anschluß des MOS-; Transistors T1 in Verbindung steht, wird der Spannungsabfall von T1 gemessen, der die in die Kollektorzuleitung eingebaute Diode D1 zum Leuchten bringt. Die Leuchtstärke der Diode D1 wird durch Bemessung des Widerstandes R1 festgelegt. : : '■■;-' The operating current is monitored and displayed on off?: ^ A transistor T2, a light emitting diode D1 and a resistor: '' R1 circuit formed. With the transistor T2, whose base * '/ via the resistor R1 to the drain terminal of the MOS; When the transistor T1 is connected, the voltage drop of T1 is measured, which causes the diode D1 built into the collector lead to glow. The luminosity of the diode D1 is determined by dimensioning the resistor R1. :

.*/- Zum Anzeigen eines Überstromes ist eine Leuchtdiode D2 ver- *;" wendet, die parallel zu R6 an der Betriebsspannung liegt und an. * / - A light-emitting diode D2 is used to display an overcurrent * ; "applies, which is connected to the operating voltage parallel to R6 and applies

fc ' den Kollektor von T5 angeschlossen ist. Die überStromauslösung *-" oder ein Kurzschluß lässt an T1 eine höhere Spannung entstehen. Wenn der Schwellwertschalter ausgelöst hat, liegt die Betriebsspannung an Tl. In diesem Falle bleibt T5 ständig leitend, der \f~ Schwellwertschalter ist selbsthaltend und die Diode D2 leuchtet fc 'the collector of T5 is connected. The overcurrent release * - "or a short circuit causes a higher voltage to develop at T1. When the threshold switch has triggered, the operating voltage is applied to Tl. In this case, T5 remains conductive, the \ f ~ threshold switch is latching and the diode D2 lights up

Α; dauernd auf.Α; constantly on.

Claims (4)

w81w81 :. ::;·ϋ':::"ΛΟ.. 3138545:. :: ; · Ϋ '::: " Λ Ο .. 3138545 PatentansprücheClaims Elektronische überstromschutzvorrichtung, insbesondere für Kraftfahrzeuge, mit einem als Widerstand geschalteten MOS-Transistor und einem elektronischen Schwellwertschalter, gekennzeichnet durch die Merkmale:Electronic overcurrent protection device, in particular for motor vehicles, with a MOS transistor connected as a resistor and an electronic threshold switch, characterized by the following features: a) der MOS-Transistor (T1), der einen dem Strom linear proportionalen Widerstand aufweist, liegt in Reihe hinter dem Verbraucher (RL) an der Stromversorgung (+ 12V),a) the MOS transistor (T1), which has a resistance linearly proportional to the current, is in series behind the consumer (RL) on the power supply (+ 12V), b) der Schwellwertschalter (1) ist über eine Verzögerungsschaltung (2) an die Leitung vom Verbraucher (RL) zum MOS-Transistor (T1) angeschlossen,b) the threshold switch (1) is via a delay circuit (2) connected to the line from the consumer (RL) to the MOS transistor (T1), c) der Schwellwertschalter steuert über eine Treiberstufe (3) den Gate-Eingang des MOS-Transistors (T* 1) .c) the threshold switch controls the gate input of the MOS transistor (T * 1) via a driver stage (3). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Schwellwertschalter (1) als Kippstufe aus den Transistoren (T5 und T6) gebildet ist, deren Ausgangssignal durch den Transistor (T7) der Treiberstufe (3) umgekehrt wird.2. Apparatus according to claim 1, characterized in that the Threshold switch (1) is formed as a flip-flop from the transistors (T5 and T6), the output signal of which through the transistor (T7) of the driver stage (3) is reversed. 3. Vorrichtung nach Anspruch 1 und 2, dadurch gekennzeichnet, daß zur Betriebsstromanzeige ein Transistor (T2) mit kollektorseitig angeschlossener Leuchtdiode (D1) dient, wobei die Basis des Transistors (T2) mit der Drain-Elektrode des MOS-Transistors (T1) verbunden ist.3. Apparatus according to claim 1 and 2, characterized in that a transistor (T2) with the collector side for operating current display connected light emitting diode (D1) is used, the base of the transistor (T2) with the drain electrode of the MOS transistor (T1) is connected. 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß am Kollektor des Transistors (T5) eine Leuchtdiode (D2) zur Anzeige des überStroms bei Selbsthaltung des Schwellwertschalters (1) angeschlossen ist.4. Device according to one of claims 1 to 3, characterized in that the collector of the transistor (T5) has a Light-emitting diode (D2) to display the overcurrent in the case of self-holding of the threshold switch (1) is connected.
DE19813138645 1981-09-29 1981-09-29 "ELECTRONIC OVERCURRENT PROTECTION DEVICE" Granted DE3138645A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19813138645 DE3138645A1 (en) 1981-09-29 1981-09-29 "ELECTRONIC OVERCURRENT PROTECTION DEVICE"
EP82105798A EP0075656B2 (en) 1981-09-29 1982-06-30 Electronic overcurrent protective device
DE8282105798T DE3270085D1 (en) 1981-09-29 1982-06-30 Electronic overcurrent protective device
JP57167724A JPS5869422A (en) 1981-09-29 1982-09-28 Overcurrent protecting device
US06/426,922 US4491892A (en) 1981-09-29 1982-09-29 Electronic current overload protection installation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813138645 DE3138645A1 (en) 1981-09-29 1981-09-29 "ELECTRONIC OVERCURRENT PROTECTION DEVICE"

Publications (2)

Publication Number Publication Date
DE3138645A1 true DE3138645A1 (en) 1983-04-14
DE3138645C2 DE3138645C2 (en) 1988-07-14

Family

ID=6142878

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19813138645 Granted DE3138645A1 (en) 1981-09-29 1981-09-29 "ELECTRONIC OVERCURRENT PROTECTION DEVICE"
DE8282105798T Expired DE3270085D1 (en) 1981-09-29 1982-06-30 Electronic overcurrent protective device

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE8282105798T Expired DE3270085D1 (en) 1981-09-29 1982-06-30 Electronic overcurrent protective device

Country Status (4)

Country Link
US (1) US4491892A (en)
EP (1) EP0075656B2 (en)
JP (1) JPS5869422A (en)
DE (2) DE3138645A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3413380A1 (en) * 1984-04-10 1985-10-17 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart DEVICE FOR OPENING AND CLOSING A TOP OF A MOTOR VEHICLE
DE3801776A1 (en) * 1988-01-22 1989-07-27 Vdo Schindling Protection circuit for a load resistor (load), which is connected to a motor vehicle battery, and its switching output stage
DE3827881A1 (en) * 1988-08-17 1990-02-22 Teldix Gmbh Circuit for monitoring electrical parameters of a voltage supply

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US4493002A (en) * 1983-02-28 1985-01-08 Westinghouse Electric Corp. Electronic circuit breaker
US4567388A (en) * 1983-10-03 1986-01-28 Motorola, Inc. Clamp circuit
DE3582797D1 (en) * 1984-10-24 1991-06-13 Om Ahuja SELF-SWITCHING SWITCH.
DE3519791A1 (en) * 1985-06-03 1986-12-04 Pepperl & Fuchs Gmbh & Co Kg, 6800 Mannheim Protection circuit against overload and short-circuit
US4680664A (en) * 1985-12-09 1987-07-14 Hughes Tool Company Overcurrent protection circuit for power transistors
NL8601761A (en) * 1986-07-07 1988-02-01 Tjeerd Venema ELECTRONICALLY CONTROLLED ELECTRIC CURRENT FUSE.
US4799126A (en) * 1987-04-16 1989-01-17 Navistar International Transportation Corp. Overload protection for D.C. circuits
US4945467A (en) * 1988-02-26 1990-07-31 Black & Decker Inc. Multiple-mode voltage converter
JP2542618Y2 (en) * 1988-08-30 1997-07-30 アルプス電気株式会社 In-vehicle load condition detection drive
GB2228377A (en) * 1989-01-24 1990-08-22 Peter Alan Kissagizlis Motor vehicle electrical isolator (emergency)
US5319515A (en) * 1990-10-12 1994-06-07 Raychem Limited Circuit protection arrangement
KR930702811A (en) * 1990-10-12 1993-09-09 죤 에버레트 벤슨 Circuit protection device and unit
GB9100283D0 (en) * 1991-01-07 1991-02-20 Raychem Ltd Overcurrent protection device
DE4326527B4 (en) * 1993-08-06 2004-11-11 Bayerische Motoren Werke Ag Safety device in motor vehicles for switching off the electrical current delivered by a motor vehicle battery
US6487507B1 (en) * 1999-10-15 2002-11-26 Micro Motion, Inc. Remote signal conditioner for a Coriolis flowmeter
CN100592857C (en) * 2006-09-29 2010-02-24 鸿富锦精密工业（深圳）有限公司 Heat radiating device
DE102014214840A1 (en) * 2014-07-29 2016-02-04 Bayerische Motoren Werke Aktiengesellschaft Device for monitoring a high-voltage electrical system of an electrically operated vehicle for the presence of an overload

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DE2539911A1 (en) * 1975-09-08 1977-03-17 Siemens Ag MOSFET threshold switch system - has triggering level independent of trigger MOSFET threshold voltage by using six MOSFETs
DE2707455A1 (en) * 1976-02-23 1977-09-01 Tokyo Shibaura Electric Co OVERCURRENT RELEASE DESIGNED AS A SEMICONDUCTOR CIRCUIT

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Publication number Priority date Publication date Assignee Title
DE2529883B1 (en) * 1975-07-04 1976-05-06 Grundig Emv Circuit arrangement for overload protection
DE2539911A1 (en) * 1975-09-08 1977-03-17 Siemens Ag MOSFET threshold switch system - has triggering level independent of trigger MOSFET threshold voltage by using six MOSFETs
DE2707455A1 (en) * 1976-02-23 1977-09-01 Tokyo Shibaura Electric Co OVERCURRENT RELEASE DESIGNED AS A SEMICONDUCTOR CIRCUIT

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3413380A1 (en) * 1984-04-10 1985-10-17 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart DEVICE FOR OPENING AND CLOSING A TOP OF A MOTOR VEHICLE
DE3801776A1 (en) * 1988-01-22 1989-07-27 Vdo Schindling Protection circuit for a load resistor (load), which is connected to a motor vehicle battery, and its switching output stage
DE3827881A1 (en) * 1988-08-17 1990-02-22 Teldix Gmbh Circuit for monitoring electrical parameters of a voltage supply

Also Published As

Publication number Publication date
DE3270085D1 (en) 1986-04-30
EP0075656A1 (en) 1983-04-06
US4491892A (en) 1985-01-01
DE3138645C2 (en) 1988-07-14
EP0075656B2 (en) 1988-01-07
JPS5869422A (en) 1983-04-25
EP0075656B1 (en) 1986-03-26

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
D2 Grant after examination
8363 Opposition against the patent
8331 Complete revocation